Device for superheating steam



G. RESTUCCI. DEVICE FOR SUPERHEATING STEAM.

APPLICATION FILED SEPT 28. I918.

Patented Aug. 10, 1920.

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UNITED STATES PATENT OFFICE.

DEVICE FOR SUPERI-IEATING- STEAM.

Specification of Letters Patent.

Patented Aug. 10, 1920.

Application filed September 28, 1918. Serial No. 256,031.

To all whom it may concern Be it known that I, GIUSEPPE Rns'ruocr, a subject of the Kingof Italy, and residing at Naples, Italy, (whose post-office address is 156 Nuovo Corso Garibaldi,) have invented certain new and useful Improvements in Devices for Superheating Steam, of hich the following is a specification.

This invention relates to a device for intensified thermic and dynamic superheating of steam. It is intended for superheating steam at the expense of the source of heat, and .the'refore it must be applied close to the automatic stop valve, preferably to'the boiler itself. i

A construction according to this invention is illustrated by way of example in the accompanying drawing, in which:

Figure 1, is a vertical section of the valve closed.

Fig. 2 is a vertical section of the valve partlyopen, and I 3 is a cross section on the line A B of Fig. 1 a, is the outer casing, aa cylinder containing several series of nozzles d, ba piston for regulating the passage of steam from the boiler to the engine, c the screw used to regulate the travel of the piston in order to uncover the series of nozzles, z' a hand wheel keyedto the screw spindle -cfor moving the latter, 'Z- steam outlet opening from the boiler, m a pipe, .-n and 0 the two walls of the piston, e a circular cage constituted by a number of circular segment blades between which steam passes on its way into the pipe -m leading to the engine, -fthe indicator of the number of series of nozzles, h a small opening intended to balance the piston.

The cylindrical piston --b which is a fairly tight fit in the cylinder -a opens or closes gradually small exhaust nozzles provided in the wall of said cylinder.

The cylinder a is surrounded by steam from the boiler which steam is ad mitted at -Z and remains at the temperature of the boiler. The steam passing through the expanding nozzles, a small quantity in each nozzle, is in contact with a comparatively large metal surface, the metal having another surface exposed at all times to the boiler steam, and consequently the metal surfaces are maintained at all times at substantially the temperature of the boiler steam. Consequently the expanding steam passing through the nozzles in contact with the hot metal takes up heat; and as the steam expands into the space between the nozzles 65 and blades 6, the heat freed by the expanding steam, which does no work in expanding, converts part of the water in the steam, if it is wet, intosteam, or if it is dry steam, will superheat it At the end of the nozzles -cl, the steam, with heat added thereto as described, is discharged against fixed blades-eshaped so as to form conduits, in which it is compressed by centrifugal action and escapes into the pipe -m through which it passes into the engine after having overcome the pressure in the pipe m'..

The pressure which is produced in the pipe m depends on two factors; exhaust and escape of the steam, which are both variable at will, but in any case in the pipe -m there is superheated steam. The object of the blades is to reduce slightly the speed of the steam and give it a centrifugal action. At the same time, in the zone comprised between the nozzles and the blades a depression is produced which maintains constant the exhaust from the nozzles themselves.

lVith the device working at the maximum power, there is obtained a fuel economy always greater than 30%a very important point, more particularly in the present conditions owing to the i nsufficiency and high price of fuels generally.

Having now particularly described and ascertained the nature of my said invention, and in wha't manner the same is to be performed, I declare that what I claim is 1 A device for superhcating steam comprising expanding nozzles, means for supplying heat to the steam while expanding, and blades arranged to impart centrifugal action to the expanded steam.

2. A device for superheatin steam comprising expanding nozzles maintained substantially at the original temperature of the steam and arranged angularly with respect to corresponding radii upon the circumference of a circle, and blades for imparting centrifugal action to the expanded steam arranged on the circumference of a concentric circle.

3. A device for superheating steam comprising a hollow cylinder having a plurality of openings in its walls, means for leading steam to the exterior of said cylinder, a hollow cylindrical piston reciprocable within said cylinder, and a plurality of blades mounted within said cylinder disposed interiorly of said piston.

4. In a device for superheating steam the combination comprising a plurality of expanding nozzles located about an axis, a plurality of blades for imparting centrifugal action to the expanded steam disposed concentric to the same axis, and a valve arranged to close the space between said nozzles and blades.

5. In a device for superheating steam, the combination comprising a hollow cylinder having a plurality of openings in its walls, a plurality of blades arranged longitudinally within said cylinder concentrically about the a is thereof, and a valve arranged for closing he space between said cylinder and blades.

6. In a device for superheating steam, the combination comprising a hollow cylinder having a plurality of openings in its walls,

a plurality of blades arranged longitudinally within said cylinder concentrically about the axis thereof, and a hollow cylindrical vvalve reciprocable within said cylinder and arranged for closing the space between said cylinder and blades.

7 In a device for superheating steam, the combination comprising a hollow cylinder having a plurality of openings in its walls, a plurality of blades arranged longitudinally within said cylinder concentrically about the axis thereof, and a hollow cylindrical valve reciprocable within said cylinder and arranged to close the space between saidcylinder and blades, said valve having a guiding projection extending interiorly of said blades.

In testimony whereof I hereunto sign my name in the presence of two witnesses.

GIUSEPPE RESTUCCI.

Witnesses KIMENZO MURSA, O. PIZZOEOLO. 

